Cayeux-sur-Mer Weather in September
What's the weather like in Cayeux-sur-Mer (Picardie) in September 2025?
The climate in Cayeux-sur-Mer during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Cayeux-sur-Mer and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 11°C (52°F) is normal.
| Daytime temperature | 18.8°C 65.8°F |
|---|---|
| Nightly temperature | 11.4°C 52.4°F |
| Average temperature | 15.1°C 59.1°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 67 mm 2.6 ins |
| Rainy days | 13 days |
| Sea temperature | 17.4°C 63.3°F |
| Humidity | 82% |
| Windspeed | 14.3kph 9 mph |
On average September is the 4th wettest month of the year in Cayeux-sur-Mer with around 67mm 2.6 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
September temperatures in Cayeux-sur-Mer
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Cayeux-sur-Mer in September 2025.
Other monthly averages
Best places to visit in September
Cayeux-sur-Mer weather stats
| Hottest month: | August | 20.8°C 69.4°F |
|---|---|---|
| Driest month: | April | 47mm 1.9ins |
| Sunniest month: | August | 7.7hrs |
| Coldest month: | January | 6.2°C 43.2°F |
| Wettest month: | November | 85mm 3.3ins |
© Google
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